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package com.core.dao.impl;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.core.dao.CountryDAO;
import com.core.database.Manager;
import com.core.entities.Country;
import com.core.exception.DAOException;

/**
 * 
 * @author himanasser
 */
public class CountryDAOImpl implements CountryDAO {

	
	private static CountryDAOImpl instance=null;
	public static CountryDAOImpl getInstance(){
		if(instance==null){
			instance=new CountryDAOImpl();
		}
		return instance;
	}
	
	Connection connection = null;

	@Override
	public Country findByName(String name) throws DAOException {
		Country country = new Country();
		try {
			connection = Manager.getConnection();
			String sql = "SELECT *FROM country WHERE name = '" + name + "'";
			PreparedStatement ps = connection.prepareStatement(sql);
			ResultSet rs = ps.executeQuery();
			int count = 0;
			while (rs.next()) {
				count++;
				if (count == 1) {
					country.setId(rs.getInt(1));
					country.setName(rs.getString(2));

					System.out.println(country);
				}
			}

		} catch (SQLException s) {
			s.printStackTrace();
		}
		return country;
	}

	@Override
	public void insert(Country o) throws DAOException {
		Connection connection = null;
		try {
			connection = Manager.getConnection();
			String sql = " INSERT INTO country (name) VALUE (? )";
			PreparedStatement ps = connection.prepareStatement(sql);
			ps.setString(1, o.getName());
			int result = ps.executeUpdate();
			if (result != 1) {
				throw new SQLException("no row inserted!");
			}
		} catch (Exception ex) {
			ex.printStackTrace();
			throw new RuntimeException("Cannot add new Country", ex);
		} finally {
			Manager.closeConnection(connection);
		}
	}

	@Override
	public Country findById(int id) throws DAOException {
		Country country = new Country();
		try {
			connection = Manager.getConnection();
			String sql = "SELECT *FROM country WHERE id = '" + id + "'";
			PreparedStatement ps = connection.prepareStatement(sql);
			ResultSet rs = ps.executeQuery();
			int count = 0;
			while (rs.next()) {
				count++;
				if (count == 1) {
					country.setId(rs.getInt(1));
					country.setName(rs.getString(2));

					System.out.println(country);
				}
			}

		} catch (SQLException s) {
			s.printStackTrace();
		}
		return country;
	}

	@Override
	public List<Country> findAll() throws DAOException {
		
		ArrayList<Country> countryList = new ArrayList<Country>();
		try {
			connection = Manager.getConnection();
			String sql = " SELECT * FROM country ";
			PreparedStatement ps = connection.prepareStatement(sql);
			ResultSet rs = ps.executeQuery();
			while (rs.next()) {
				Country country = new Country();
				country.setId(rs.getInt(1));
				country.setName(rs.getString(2));
				countryList.add(country);
			}
		} catch (SQLException s) {
			s.printStackTrace();
		}
		return countryList;
	}

	@Override
	public void delete(int id) throws DAOException {
		Country country = new Country();
		try {
			connection = Manager.getConnection();
			String sql = " DELETE FROM country WHERE id = '" + id + "'";
			PreparedStatement ps = connection.prepareStatement(sql);
			int result = ps.executeUpdate();
			if (result != 1) {
				ps.setString(1, country.getName());

			}

		} catch (SQLException s) {
			s.printStackTrace();

		}
	}

	@Override
	public void update(Country o) throws DAOException {

		try {
			connection = Manager.getConnection();
			String sql = "UPDATE country SET name = '" + o.getName()
					+ "' WHERE id = " + o.getId();
			PreparedStatement ps = connection.prepareStatement(sql);
			int result = ps.executeUpdate(sql);

			if (result != 1) {
				ps.setString(1, o.getName());

			}

		} catch (SQLException s) {
			s.printStackTrace();
		}
	}
}
